1999 Dodge Durango torsion bar

Suspension problem
1999 Dodge Durango V8 Four Wheel Drive Automatic

How do I remove the torsion bar from the a-arm. I am replacing the lower a-arm as it broke around the lower ball joint. I got a used one from the junk yard. So I have to remove stub of a torsion bar from one and replace it with mine, which is still in the broken a-arm.